However, I must correct that there is no music genre called "Gregorian dance". But I assume you meant to ask about "Gregorian chant" or "New Age/Gregorian-inspired music". Here's a description of the latter:

Gregorian-inspired music is a genre characterized by lush, atmospheric soundscapes, often featuring layered vocal harmonies, chant-like melodies, and soft, pulsing electronic beats. Emerging in the 1990s, this style drew inspiration from ancient Gregorian chant, incorporating elements of ambient, new age, and world music. Artists associated with this genre often blend traditional instrumentation with modern production techniques, creating a distinctive, ethereal sound. This style gained popularity in the late 1990s and early 2000s, particularly among fans of ambient and new age music. Its cultural significance lies in its ability to evoke a sense of spirituality and calm, while its relationship to other genres, such as ambient and electronic, has influenced the broader landscape of contemporary music.

In The Deep (Clan of Xymox Remix)

Delerium•

Clan of Xymox

Single - Released November 1, 2024